Ejecting mechanism for shotguns



Nov. 17, 1964 F. DAMON EJECTING MECHANISM FOR SHOTGUNS 2 Sheets-Sheet 1 Filed Sept. 23, 1963 Nov. 17, 1964 Filed Sept. 25 1963 F. DAMON EJECTING MECHANISM FOR SHOTGUNS 2 Sheets-Sheet 2 United States Patent 3,156,994 EEECTENG MEQHANHSBM F63 HTGUNS Frederic Damon, l3 Qours Fanriel, Saintlltienne, France Filed Sept. 23, 1963, Ser. No. 310,618 Claims priority, application France, Get. 2, 1952, 42,920, Patent l,342,93l 3 Qlaims. (Cl. 42-47) One object of this invention is to provide an improved cartridge ejecting mechanism for guns having rocking barrels.

Another object of the invention is to provide such a cartridge mechanism which takes no power from the firing hammer, but, on the contrar contributes to give it some energy.

A more specific object of the invention is to provide such a mechanism wherein the cartridge is ejected only after having been fired, i.e. that, when opening the gun without preliminary firing, the cartridge remains in the corresponding chamber of the barrel.

These objects are accomplished in a preferred embodiment of the invention by mounting on the rocking barrel assembly a pivotal spring-operated ejecting sear which temporarily retains a spring operated ejecting hammer at the beginning of the gun opening operation, only it the corresponding cartridge has been fired, the firing cock thus having released a pivotal cocking scar and a slidable cooking rod both mounted in the breech block. The said slidable cocking rod is provided with a cog having an upper cam surface adapted to operate the lower end of the said ejecting sear.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawings, forming a part of the specification.

FIG. 1 is a side view diagrammatically showing an ejecting mechanism according to the invention on a two superposed-barrels gun, said gun being open.

FIG. 2 is a top plan view of the ejecting sear.

FIG. 3 corresponds to FIG. 1, the gun being fast closed.

FIG. 4 shows the gun and mechanism in closed and cocked position.

FIG. 5 corresponds to FIG. 4 and shows the mechanism after firing.

The invention is shown in FIG. 1 in connection with a gun having two superposed rocking barrels, the axes of which are indicated by the numerals 4a and b.

The breech block it is diagrammatically illustrated and its rear vertical face, intended to obturate the rear portions of the barrels, is designated 2 (FIG. 1). Through this face 2 extend two firing pins, not shown. The rear vertical face of the barrels is indicated by the numeral 3. The barrels are both rigidly secured to an articulation member 5 extending between the lateral flanges of tote breech block 1 and pivotally carried by two opposite articulation lugs 6.

Each barrel is provided with an extractor. For simplification purposes, only one of these extractors has -een represented, namely the extractor 7 corresponding to the upper barrel 4a. The mechanism actuating the not illus trated extractor is quite similar to the hereafter described mechanism of the extractor 7.

The extractor 7 is integral with a rod 3 laterally sliding along the barrels in a plane situated above the plane of the drawings. The rod corresponding to the other extractor is similarly situated on the other side of the barrels and it has not been represented either. The front end of the rod 8 may be actuated by an ejecting hammer 9, also slidably mounted on the same side of the barrels. As shown, the ejecting hammer 9 is'provided with a crosssectional rectangular head and is integral with a cylindrical stern 9a slidably carrying a helical return spring it The not illustrated front end of the latter rests on a fixed wall through which the stem 9a is slidably engaged. The head of the ejecting hammer 9 is provided with a lateral snug hb engaging the front edge of the breech block ll when closing again the gun.

The articulation member 55 carries a lateral shaft iii pivotally supporting an ejecting sear 12 adapted to eventually retain the ejecting hammer 9, as hereafter described. The said ejecting sear 12 has a nose 12a (FIG. 2) engaging the ejecting hammer 9, and a lateral cam portion 12b engaging an internal recess la provided in the front portion of the next lateral flange of the breech block 1. The ejecting sear i2 is integral with a rod extending downwardly. The lower face of the cam portion 12b is operated by a push-rod 1.3 slidably mounted in a hole of the articulation member 5. By means of a return spring 14, the push-rod l3 urges the nose of the sear 12 against the ejecting hammer 9 in order to retain it by its rear face when the said ejecting hammer 9 has been sufficientiy displaced in direction of the free ends of the barrels.

At the bottom of the breech block 1 is slidably mounted a cocking rod 15 which is backwards displaced by a lug 16, integral with the articulation member 5, when opening the gun by rocking the barrels about the articulation lugs 6. The cocking rod 15 is provided with a tooth 25 having an upper cam surface 15a adapted to engage the rod 12c of the ejecting sear 12. The rear end of the cocking rod 15 carries a lateral lug l7 engaging in a corresponding notch of a cocking sear 1:8 pivotally carried by a transversal shaft 19 rigidly secured to the breech block 1. The cooking sear 18 is provided with a holding portion 18a adapted to engage in a notch 29a of the hammer 2!) of the corresponding barrel do. As usually, the hammer 29 has a striking portion 20b adapted to strike on a firing-pin, not shown on the drawings. Moreover, the hammer 2% is provided in the usual mannerwith a firing sear Zilc which is retained by the trigger 2i of the barrel 4a. The firing cocks are both pivotally carried by a transversal shaft 22.

The operation is as follows:

\Vhen opening the gun and rocking the barrels until the position shown in FIG. 1, the lug 16 pushes back the cocking rod 15 which slides backwards, and counterclockwise rotates the cocking sear 13. The holding portion 18a of the latter engages the hammer 26 and pivots it clockwise until the full-cock position shown in FIG. 1. The nose of the trigger 21 is then situated immediately behind the firing sear 2'90 in view of retaining it after the gun has been closed again.

At this open position of the barrels (FIG. 1), the ejecting hammer 9 pushes back the rod 8 and retains the ex tractor '7 at its rearmost position.

When now rocking back the barrels 4-da in order to close the gun, the firing-cock is retained by the trigger 21, as above mentioned. At the end of the closing operation, the rear vertical face 2 of the breech block ll displaces the extractor 7, possibly together with a cartridge which was previously retained in uncompletcly inserted position by means of the said extractor 7. At the same time, the lateral snug 9b of the ejecting hammer 9 comes into abutment against the front edge of the breech block It, and the said ejecting hammer 9 is pushed back thus compressing the return spring iii. The whole mechanism is then at the position illustrated in FIG. 3 wherein the gun is still uncompletely closed. It is seen that the lower end of the rod 12c of the ejecting sear 12 begins to engage the cam surface 15a of the tooth 25. Consequently to the oblique profile of this cam surface 15a, the said end of the rod 12c progressively slides along it shown in FIG. 5.

I55 and snaps back behind the rear vertical face of the tooth 25, under action ofthe return-spring 14, when the gun is completely closed, as shown in FIG. 4.

It is important to observe that during all this operation, the return spring 14 urges the lower end of the rod 120 against the oblique cam surface a, thus imparting to the cog 25 a forwardlyqorientated reaction. The latter is transmitted to the hammer by means of theccckingsear 18 and counterclockwise urges the said hammer 2%, i.e, in the direction offiring.

The gun then being completely closed, two dinerenr possibilities may happen:-

( lr); Either thethe cartridge is fired, by. pressing the trigger 27, the hammer 20 then freely counterclockwise rotating under action of its usual percussion spring, not. shown; in'the drawings; At the beginning of this relation, the hammer 20 isjactuated together by the saidpercussion spring and by the above mentioned: reaction of the return spring 1d on the. cocking sear 18. Far. from preventing the percussion, the ejecting mechanismaccording to the invention thus contributes to energize the hammet 20. The cocking rod 15 is forwardly-pushed bacl; by means of the rod 120 engaging the rear face or" the tooth under action of the return spring 14. The nose 12a of the ejecting sear 12, is thus upwardly rocked and inserted behind the rear face of the ejecting hammer 9, the latter having previously been forwardly pushed by action of its lateral projecting part 92') against the front.

edge of the breech block 1-. The front end of the rod 3.

has a slight recess 2.6 in.,order to permit this movement of the nose 12a. The mechanism is then at'the position It is important to observe that the ejecting sear is exclusively energized by the return spring 14, and that it takes no power from the firing mechanism.

If the gun is then opened again, the ejecting hammer 9 is retained by the nose 12a of the ejecting sear 12 until the end. of the opening operation. At this time, thecam portion 1211 comes into abutment with the internal recess 1a of the breech block 1, thus lowering the ejecting sear 12 against the action of, the return spring 14.. The nose 12a.snaps out of the ejecting hammer 9, and the latter is suddenly pushed back by its return spring ltl, thus violently striking the rod 8 and ejecting the fired cartridge.

The mechanismis then again at the position illustrated in guns and the like of the class described having a rocking barrel assembly anda breech block, the combination of aspring operated. ejecting hammer; a spring operated ejecting sear having a nose urged transversally towards ithe said ejecting hammer and an ejecting sear rod; a slidable cocking rod having a lateral tooth provided'with a rear vertical face and with a cam surface engaging the end of the said ejecting sear rod during the operation of closing the gun; a pivotal cocking sear having a notch receiving a lateral lug integral with the rear end of the said cocking rod; 3, lug integral with the rocking barrel assembly and engagingthe front end of the said cocking rod in order to urge the latter backwards when the gun is open; a pivotal hammer having a notch in which engages the said cocking sear at full-cock position, thus urging the said pivotal hammer in percussion direction under action of the said spring operated ejecting scar; and an extractor slidably mounted in the said rocking barrel assembly, which said extractor comes into abutment with a vertical face of the said breech block when the gun is closed and pushes back the said spring operating ejectinghammer.

2. An ejecting mechanism as claimed inclaim 1, Wherein the said ejecting sear is pivotally carried by a shaft provided on the said rocking barrel assembly and has, near its said nose, a lateral cam portion engaging an internal recess of the said breech block in order to pivot the said spring operated ejecting sear against its spring thus disengaging the said ejecting hammer at the end of the gun opening operation.

3. In an ejecting mechanism for the fired cartridges of guns and the like of the class described havinga rocking barrel assembly and a breech block or" the class described, the combination of a spring operated ejecting sear having a nose urged transversally towards an ejecting hammer and ejecting sear rod; a slidable cocking rod having a lateral tooth provided with a rear vertical 'face and with a cam surface engaging the end of the said ejecting sear rod during the operation of closing the gun; a pivotal cocking sear having a notch receiving a laterallug integral with the rear end of the said cocking rod; a lugintegral j with the rocking barrel assembly and engaging the front end of the said cocking rod in order to urge the latter backwards when the gun is open; a pivotal hammer having a notch in which engages the said cocking sear at full-cock position, thus urging the said pivotal hammer in percussion direction under action of the said spring operated ejecting sear; and an extractor slidably mounted in the said rocking barrel assembly, which said extractor comes into abutment with a vertical face of the said breech block when the gun is closed and pushes back the said spring operated ejecting hammer; the said ejecting sear rod engaging the rear vertical face of the said lateral tooth when the gun is closed, and the nose of the said pivotal ejecting sear engaging the rear face of the said spring operated ejecting hammer in order to retain itonly.

after firing the gun, i.e. when the said pivotal firing cock to be forwardly pushed by the said rod of the said spring operated ejecting sear.

No references cited. 

1. IN AN EJECTING MECHANISM FOR THE FIRED CARTRIDGES OF GUNS AND THE LIKE OF THE CLASS DESCRIBED HAVING A ROCKING BARREL ASSEMBLY AND A BREECH BLOCK, THE COMBINATION OF A SPRING OPERATED EJECTING HAMMER; A SPRING OPERATED EJECTING SEAR HAVING A NOSE URGED TRANSVERSALLY TOWARDS THE SAID EJECTING HAMMER AND AN EJECTING SEAR ROD; A SLIDABLE COCKING ROD HAVING A LATERAL TOOTH PROVIDED WITH A REAR VERTICAL FACE AND WITH A CAM SURFACE ENGAGING THE END OF THE SAID EJECTING SEAR ROD DURING THE OPERATION OF CLOSING THE GUN; A PIVOTAL COCKING SEAR HAVING A NOTCH RECEIVING A LATERAL LUG INTEGRAL WITH THE REAR END OF THE SAID COCKING ROD; A LUG INTEGRAL WITH THE ROCKING BARREL ASSEMBLY AND ENGAGING THE FRONT END OF THE SAID COCKING ROD IN ORDER TO URGE THE LATTER BACKWARDS WHEN THE GUN IS OPEN; A PIVOTAL HAMMER HAVING A NOTCH IN WHICH ENGAGES THE SAID COCKING SEAR AT FULL-COCK POSITION, THUS URGING THE SAID PIVOTAL HAMMER IN PERCUSSION DIRECTION UNDERACTION OF THE SAID SPRING OPERATED EJECTING SEAR; AND AN EXTRACTOR SLIDABLY MOUNTED IN THE SAID ROCKING BARREL ASSEMBLY, WHICH SAID EXTRACTOR COMES INTO ABUTMENT WITH A VERTICAL FACE OF THE SAID BREECH BLOCK WHEN THE GUN IS CLOSED AND PUSHES BACK THE SAID SPRING OPERATING EJECTING HAMMER. 